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%I #17 Apr 01 2017 13:59:48
%S 1,1,0,-2,-4,-4,24,176,272,-1712,-14528,-66912,181312,4737344,
%T 20265088,-53926656,-1771263744,-18559434496,4388386816,1869838374400,
%U 16325400792064,35429689535488,-1796402984175616,-36301265658269696
%N Expansion of exp(x)/cosh(sinh(x)).
%t With[{nn=30},CoefficientList[Series[Exp[x]/Cosh[Sinh[x]],{x,0,nn}], x] Range[0,nn]!] (* _Harvey P. Dale_, Sep 18 2011 *)
%K sign,easy
%O 0,4
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
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